Gas-engine.



J. M. OBRIEN.

GAS ENGINE.

APPLICATION men ocr. 8. IBM.

1,283,276. Patented Oct 29, 1918.

iNVENTOR WITNESSE B W 1 Zr'uJ-w.

4 ATTORNEY UNITED STATES PATENT OFFICE.

JOHN M. OBRIEN, OF WEST WINFIFLD, NEW YOll-K.

GAS-ENGIIN E.

Application filed October 8, 1917.

To all whom it may concern Be it known that I, JoiIN M. OBmn'u, a citizen ottheUuited States, residing at Nest iVinticld, in the county of Herkinier and State of New York, have invented certain new and useful mprmements in (his-Engines, of which the following is a specification.

This invention has relation to internai combustion engines, and more particularly to tworyele engines, and has for an object to provide an engine of this type embodying a plurality of cylinders having a common crank casing thcrebctween.

Another object oi. the invention is to pro- Vide an internal combustion engine of the two-cycle type embodying means including a valve located between the cylinder and the crank ease, to permit compression of the charge to take place between the under side of the piston and said vaive means.

In addition to the foregoing my invention comprehends improvements in the details of construction and arrangement of the parts to be hereinafter more fully described and particularly set forth in the appended claim,

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear:

Figure 1, is a view in side elevation of a two-cycle internal combustion engine embodying my invention.

Fig. 2, is a view in vertical section taken. transversely through one of the cylinders of the engine and Fig. 3, is a horizontal transverse section taken on the line 3-3 of the preceding figure.

W'ith reference to the drawings 10 indicates a crank casing and 11 a cank shaft journaled therein having an otlset 12. A plurality of cylinders 13 are mounted on the crank case in the usual manner.

'Each cylinder is provided with an annu lar groove 14. at the lower end thereof adjacent the point of connect-Ion of the cylinder with the crank case. A ring 15 is inserted in the annular groove and rests againstui shoulder 16 formed by the provision of the groove, the inner surface of the ring being curved to conform to the surface of a sphere. A valve 17 in the nature of a substantially semi-spherical hollow member is located in Specification of Letters Iatent.

Serial No. 135,428!

the lower end of the cylinder and is designed to snugiy tit the curved inner surface of the ring cl .3 a ilhwtrated. A second ring 12:1 is th in'n'rtwl in the lower end of the ey 'linder and :iiozilaily formed with a curved inn r u fac to conform to the surface of tin: 'yaiao t" 4 wherein. said valve is heid in plaie and ii the same time is per mittcd to rotate.

The piston, iin irated at 19 is provided with a conm tin rod so which extends through the cylinder into the crank cas and is (,(Wliltttt'ti to in, onset of the crank shaft The coma-ethic rod iXi'OiKlS through a sub stantially spherirai bearing member 21 which is held within an opening 22 in the spherical valve 17, the surface oi the opening being curved to conform to the curved sur face of tin nu nhrr 2L a ring it?) being then inserted ooening to engage the spherical memia to prevent displacement thereot. the he is designed for sliding iiioreiii nt u i neriral member L l. It is to he I; h an opening M is formed in the in ratio ti adjacent the shoulder i i he i, llliti so that the opening may sci" at titan-s to establish communi- :ation betwe n the cylinder and the interior of the cranh wing when the valve 17 is rotated for t a purp The Hat side of the semi-spher rair-u 1T formed with an elongated suing iii through which the connection him it 3r nits, Hwid connecting rod heiug rm tzwgutar section so as trprcvent rotation ot the spherical memhir 1* relative to said connecting rod. it 'tlli)t1- reter, ii'uiieated in. i may he placed in communieation with the interior of the crank casing whereby the vapor generated by the carbureter may be drawn into said crank easing during operation of the engine.

An inlet sort 27 is provided in one wall of the cylinder :uljarcniythe head end, and a port 28 is provided in the cylinder wall at a point adjacent the opposite end thereof, locat'cd so as not to he COVOI't'il by the piston when the some is at; its lowermost position. The ports :2? and 291 are then connected by means of a by pass tube '31). it n exhaust port St) is t rmed adjacent the head end of the cylinder in th usnai manner.

lhzring rota! ion i the rrauk shaft, it will be apparent. that owing to the oscillatory moven'ient oi' the ronnertiug rod and the universai com'iection thereof with the semi- 

